CVE-2026-50152

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Monitor subscription handler fails to properly authorize access to the configuration-key store, allowing any CephX user with only `mon allow r` capabilities to read the entire store by sending a single crafted MMonSubscribe message. The config-key store holds sensitive secrets including OSD LUKS disk-encryption passphrases and, on cephadm-managed clusters, the SSH private key that cephadm uses to reach every host in the cluster. Because that key grants root on every node under the default cephadm configuration, a low-privileged read-only account can escalate to full cluster and host compromise. This issue is fixed in versions 20.2.4 and 19.2.6

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.3

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727
https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84
https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 00:18

Updated : 2026-09-08 21:11

NVD link : CVE-2026-50152

Mitre link : CVE-2026-50152

CVE.ORG link : CVE-2026-50152

JSON object : View

Products Affected

No product.

CWE

CWE-285

Improper Authorization

{"id": "CVE-2026-50152", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50152", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-01T03:56:17.495692Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.3, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "ceph", "product": "ceph", "versions": [{"status": "affected", "version": ">= 19.0.0, < 19.2.6"}, {"status": "affected", "version": ">= 20.0.0, < 20.2.4"}]}]}], "published": "2026-08-28T00:18:07.073", "references": [{"url": "https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727", "source": "security-advisories@github.com"}, {"url": "https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84", "source": "security-advisories@github.com"}, {"url": "https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-285"}]}], "descriptions": [{"lang": "en", "value": "Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Monitor subscription handler fails to properly authorize access to the configuration-key store, allowing any CephX user with only \u00a0`mon allow r` capabilities to read the entire store by sending a single crafted MMonSubscribe message. The config-key store holds sensitive secrets including OSD LUKS disk-encryption passphrases and, on cephadm-managed clusters, the SSH private key that cephadm uses to reach every host in the cluster. Because that key grants root on every node under the default cephadm configuration, a low-privileged read-only account can escalate to full cluster and host compromise. This issue is fixed in versions 20.2.4 and 19.2.6"}], "lastModified": "2026-09-08T21:11:56.250", "sourceIdentifier": "security-advisories@github.com"}